Articles Posted in the " Refrigeration " Category

  • RELATION BETWEEN COP, EER and SEER

    RELATION BETWEEN COP, EER and SEER

    RELATION BETWEEN COP, EER AND SEER COP = N/W N is the cooling effect say in watts W is the work input in watts EER The Energy Efficiency Ratio (EER) of a particular cooling device is the ratio of output cooling in Btu/hr to energy input in watts at a given single operating point. EER […]


  • CLERANCE VOLUMETRIC EFFICIENCY

    CLERANCE VOLUMETRIC EFFICIENCY

    https://www.mesubjects.net/wp-admin/post.php?post=7801&action=edit     Centri and Axial compressors https://www.mesubjects.net/wp-admin/post.php?post=7773&action=edit      Recip and rotary Compressors https://www.mesubjects.net/wp-admin/post.php?post=7649&action=edit      Air compressors https://www.mesubjects.net/wp-admin/post.php?post=7344&action=edit       Fill Blanks-compressor https://www.mesubjects.net/wp-admin/post.php?post=6740&action=edit      Refri Reciprocating compressors CLERANCE VOLUMETRIC EFFICIENCY Clearance is a must in a compressor. It does not allow the piston to  strike the cylinder head. Clearance does not permit to such full amount of gas. Exhaust gases left in […]


  • REFRIGERATION CHARTS AND TABLES

    REFRIGERATION CHARTS AND TABLES

                https://www.mesubjects.net/wp-admin/post.php?post=4198&action=edit        MCQ Vapor Comp Ref https://www.mesubjects.net/wp-admin/post.php?post=4190&action=edit       MCQ Cascade REF https://www.mesubjects.net/wp-admin/post.php?post=4089&action=edit     MCQ Refrigerant Leakage https://www.mesubjects.net/wp-admin/post.php?post=3109&action=edit         Q. ANS Refrigerants https://www.mesubjects.net/wp-admin/post.php?post=6982&action=edit              Filling blanks Refnts https://www.mesubjects.net/wp-admin/post.php?post=4078&action=edit                MCQ REFNTS REFRIGERATION CHARTS AND TABLES      Working substance in refrigeration is vapor.  Gas laws do not apply to vapors. There are complicated equations of […]


  • VAPOR COMPRESSION  REFRIGERATION CYCLES

    VAPOR COMPRESSION  REFRIGERATION CYCLES

      https://www.mesubjects.net/wp-admin/post.php?post=358&action=edit        Gas Refrigeration-1 https://www.mesubjects.net/wp-admin/post.php?post=483&action=edit       Q. Ans Air Refrigeration-2 https://www.mesubjects.net/wp-admin/post.php?post=415&action=edit         Q. Ans Refrigeration https://www.mesubjects.net/wp-admin/post.php?post=407&action=edit         Off and On controls-Refrigeration https://www.mesubjects.net/wp-admin/post.php?post=371&action=edit         Q. Ans Air Refrigeration-3 https://www.mesubjects.net/wp-admin/post.php?post=437&action=edit          Q Ans Super heating & sub-cooling https://www.mesubjects.net/wp-admin/post.php?post=11606&action=edit        Filling Blanks in Refrigeration https://www.mesubjects.net/wp-admin/post.php?post=7362&action=edit           Refri trouble shooting https://www.mesubjects.net/wp-admin/post.php?post=4410&action=edit       Open and hermetically sealed compressor units https://www.mesubjects.net/wp-admin/post.php?post=5067&action=edit      Refrigeration https://www.mesubjects.net/wp-admin/post.php?post=4194&action=edit       MCQ non-conventional refrigeration https://www.mesubjects.net/wp-admin/post.php?post=4198&action=edit        MCQ […]


  • REFRIGERATION BASICS

    REFRIGERATION BASICS

      https://www.mesubjects.net/wp-admin/post.php?post=345&action=edit          Refrigeration basics theory-2 https://www.mesubjects.net/wp-admin/post.php?post=338&action=edit         Refrigeration tables & charts https://www.mesubjects.net/wp-admin/post.php?post=328&action=edit       Vapor Compression Refrigeration Cycles REFRIGERATION BASICS Refrigeration is lowering of temperature. Conventional & non-conventional methods are in use.  Use Silica gel in the drier cum filter to remove any moisture. Use steel pipes with ammonia. Use copper pipes with halogenated hydrocarbon refrigerants. […]


  • DATUM LEVEL REFRIGERATION

    DATUM LEVEL REFRIGERATION

    DATUM LEVEL REFRIGERATION ASSUMED DATUM LEVEL FOR VARIOUS VAPOR REFRIGERANTS FPS units(–400 F) mks units( 00 C) SI units (-400 C)    hl=0 sl=0   hl=100 k cal/kg sl=1.0 k cal/kg 0 C   hl=0 sl=0 Where hl is enthalpy of liquid and sl is entropy of liquid respectively. FOR WATER, ASSUMED DATUM LEVEL  IN SI UNITS DATUM LEVEL […]


  • SYMBOLS-REFRIGERATION AND AIR CONDITIONING

    SYMBOLS-REFRIGERATION AND AIR CONDITIONING

    SYMBOLS-REFRIGERATION AND AIR CONDITIONING Symbols in refrigeration make the study simpler and easy. Standard symbols saves lot of time too. These help to increase the understanding deep and clear. A Area m 2 C Concentration of Low boiling component No units D Diameter m G Mass flux is Rate of mass flow per unit area Kg/s […]


  • * REFRIGERANT CLASSIFICATION

    * REFRIGERANT CLASSIFICATION

    REFRIGERANT CLASSIFICATIONREFRIGERANT The working substance in a refrigeration unit is called a refrigerant. IDEAL REFRIGERANT A refrigerant which has all the desirable properties and can be used in every refrigeration unit is called an ideal refrigerant. But there is no such refrigerant in actual practice.  TYPES OF REFRIGERANTS ON THE BASIS OF THEIR APPLICATION Five […]